[PATCH] D117097: [AArch64] Basic demand elements for some intrinsics

[David Sherwood via Phabricator via llvm-commits]

david-arm added a comment.

The change looks sensible to me, although I was a little confused by the commit message? It looks like what your patch is doing is just adding an AArch64 version of simplifyDemandedVectorEltsIntrinsic, that allows us to potentially simplify the input operand to the intrinsic based on the demanded elements. So, for example, if we know that we are only going to use the first N elements of the intrinsic result we can use that information to simplify the intrinsic operand too.


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https://reviews.llvm.org/D117097